diff --git a/cake/libs/controller/components/request_handler.php b/cake/libs/controller/components/request_handler.php
index 42b915516..72f0f7a33 100644
--- a/cake/libs/controller/components/request_handler.php
+++ b/cake/libs/controller/components/request_handler.php
@@ -427,7 +427,9 @@ class RequestHandlerComponent extends Object{
 		}
 
 		if ($cType != null) {
-			header('Content-type: ' . $cType);
+			if (DEBUG < 2) {
+				header('Content-type: ' . $cType);
+			}
 			$this->__responseTypeSet = $cType;
 			return true;
 		} else {